Electronic keyboard



FIG. 1 is a perspective view of the front, top and right side of an electronic keyboard showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of the electronic keyboard is included for the purpose of illustrating unclaimed portions of the electronic keyboard and forms no part of the claimed design. 

CLAIM The ornamental design for an electronic keyboard, as shown and described. 